20189416

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{109}}^1\times {\mathrm{137}}^1$

素因数の和:278

約数の個数: 48

約数和(自身を含む): 41669100

約数和(自身を除く): 21479684

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 109, 137, 169, 218, 274, 338, 436, 548, 676, 872, 1096, 1352, 1417, 1781, 2834, 3562, 5668, 7124, 11336, 14248, 14933, 18421, 23153, 29866, 36842, 46306, 59732, 73684, 92612, 119464, 147368, 185224, 194129, 388258, 776516, 1553032, 2523677, 5047354, 10094708, 20189416]

約数ペア:

[(1, 20189416), (2, 10094708), (4, 5047354), (8, 2523677), (13, 1553032), (26, 776516), (52, 388258), (104, 194129), (109, 185224), (137, 147368), (169, 119464), (218, 92612), (274, 73684), (338, 59732), (436, 46306), (548, 36842), (676, 29866), (872, 23153), (1096, 18421), (1352, 14933), (1417, 14248), (1781, 11336), (2834, 7124), (3562, 5668)]